package api;

import cn.hutool.core.util.StrUtil;
import cn.hutool.json.JSONUtil;
import common.ApplicationVariable;
import lombok.SneakyThrows;
import model.Order;
import model.ResultData;
import model.UserInfo;
import util.DBUtil;
import util.SessionUtil;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;

@WebServlet("/orderlist")
public class OrderListServlet extends HttpServlet {
    @SneakyThrows
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        List<Order> data=new ArrayList<>();
        int state=-1;
        String msg="未知错误";
        String flag=req.getParameter("flag");
        String sql="select o.*,u.username from `order` o,userinfo u where o.uid=u.uid";
        if(!StrUtil.isBlank(flag)){ // 查询当前登录用户的订单，否则查询全部订单
            UserInfo userInfo= SessionUtil.getSessionUserInfo(req);
            if(userInfo!=null){
                sql+="and o.oid="+userInfo.getUid();
            }else{
                // 未登录
                msg="未登录，非法查询";
            }
        }
        // 查询数据库得到订单列表
        sql+="order by oid desc";
        Connection connection= DBUtil.getConnection();
        PreparedStatement statement=connection.prepareStatement(sql);
        ResultSet resultSet=statement.executeQuery();
        while(resultSet.next()){
            Order order=new Order();
            order.setOid(resultSet.getInt("oid"));
            order.setCreatetime(resultSet.getString("createtime"));
            order.setMoney(resultSet.getBigDecimal("money"));
            order.setState(resultSet.getInt("state"));
            order.setUsername(resultSet.getString("username"));
            data.add(order);
        }
        DBUtil.close(resultSet,statement,connection);
        state=200;
        // 将结果返回给前段
resp.setContentType(ApplicationVariable.RESPONSE_CONTENT_TYPE);
resp.getWriter().println(JSONUtil.toJsonStr(new ResultData(state,data,msg)));
    }
}
